TestFit and Deepblocks both help a developer decide whether a site works, but they begin in different places. TestFit starts from the site and generates plans, parking and building layouts that export to Revit, CAD and SketchUp. Deepblocks starts from zoning: it says it covers zoning and parcel data for U.S. cities, then shows 3D massing and a financial model. TestFit's Site Solver is priced annually, while Deepblocks lists monthly plans by city count. Pick TestFit for design-grade geometry. Pick Deepblocks if zoning-first screening in the cities you work in is the need.
Published by Titleman, which makes a competing tool but is not one of the two products compared here. Updated 19 October 2026.
Side by side
| Criterion | TestFit | Deepblocks |
|---|---|---|
| Tagline | "Automate Site Plans. Accelerate Decisions." | "Know where you can build. And whether it pencils." |
| Starting point | A site boundary and program | A parcel in a built city, with its zoning |
| Core output | Site Solver and Parking Solver layouts | Zoning and parcel data, 3D massing, feasibility and a financial model |
| Building types | Multifamily, single-family, industrial, data center, retail, hotel, parking | Multifamily, condo, retail, office, hotel and industrial |
| Exports | CSV, DXF, glTF, PDF, SKP; Revit add-in | Branded PDF, CSV of assumptions, link sharing; no Excel export mentioned |
| Coverage limit | Not stated | Zoning is unavailable until a city is built; cities are built on request, typically in zero to three business days |
| Listed prices | Parking Solver 195 dollars a month; Site Solver from 15,000 dollars a year; Portfolio from 20,000 dollars a year | Development plans from 99.99 dollars a month for about 5 cities, to 499.99 dollars for about 30 |
| Not yet live | Not applicable | Site selection agents "coming October 2026"; a data API "coming soon" |
All details are from testfit.io and deepblocks.com, read on 19 October 2026.
TestFit, from its site
TestFit lists a Site Solver and a Parking Solver, with add-ons on the Parking Solver for site intelligence (150 dollars a month), pro forma (170 dollars) and an MCP connection (100 dollars). Its integrations page names a Revit add-in and AutoCAD, SketchUp and other connections. Support and training are English only, 9am to 5pm Central. The pricing page mentions no free tier or trial.
Deepblocks, from its site
Deepblocks' live product, DEV, combines zoning and parcel data, 3D massing, a feasibility and financial model, and scenarios across six building types. Plans are monthly and scale with the number of cities: about 16 cities at 299.99 dollars a month and about 30 at 499.99 dollars, with extra usage billed on demand. Its site-selection product, AIM, is a separate subscription and was listed as coming in October 2026, so we could not confirm it had launched. Deepblocks says unpublished values are left blank unless they can be reliably estimated, which is a useful signal to check against any output.
Who should pick which
- Architects, engineering teams and developers who hand geometry to design: TestFit, for its export formats and Revit link.
- Investors and small developers screening parcels in several covered cities on a monthly budget: Deepblocks, for the lower entry price and the built-in model.
- Anyone working in a city Deepblocks has not built: ask for the build first, since zoning will be missing until it is done.
- Teams that need an Excel model: check both. TestFit mentions Excel on its home page but not on its integrations page, and Deepblocks mentions CSV, not Excel.
Where Titleman fits
Titleman is a third option and not a substitute for either layout tool. Its feasibility study works from the address or parcel number, reads the zoning with the source for each figure, tests every lawful use, class and unit size, and ranks up to ten schemes by annual return on the asking price in a live Excel workbook. It does not produce massing or CAD. The median run took about 28 minutes (80 finished and charged runs, 30 days to 11 October 2026). See real estate development feasibility software.
What neither replaces
- A survey, title search, geotechnical and environmental reports.
- A zoning attorney or planning department for variances.
- An architect's drawings and a contractor's pricing.
FAQ
What is the difference between TestFit and Deepblocks?
TestFit generates site plans, parking and building layouts that export to design tools. Deepblocks starts from zoning and parcel data in cities it has built, then shows 3D massing and a financial model.
How much does Deepblocks cost?
On 19 October 2026 Deepblocks listed its development plans at 99.99 dollars a month for about 5 cities, 299.99 dollars for about 16 and 499.99 dollars for about 30, with extra usage billed on demand.
How much does TestFit cost?
TestFit listed the Parking Solver at 195 dollars a month, the Site Solver from 15,000 dollars a year and the Site Solver Portfolio from 20,000 dollars a year.
Does Deepblocks cover every U.S. city?
No. It builds cities on request, typically in zero to three business days, and zoning is unavailable until a city is built.
Do either of them export to Excel?
TestFit's home page mentions Excel export, but its integrations page lists CSV, DXF, glTF, PDF and SKP. Deepblocks lists a CSV of assumptions and a branded PDF. Confirm the format you need.
Written by the Titleman team with AI assistance (Claude). Statements about other companies come from each company's own website or documentation, read on 19 October 2026, and are marked as theirs. Titleman competes with some of the products discussed here.
Sources: testfit.io and its pricing and integrations pages; deepblocks.com; all read 19 October 2026. Titleman run time: median request-to-delivery for finished and charged feasibility runs, 12 September to 11 October 2026, from Titleman's own production records.